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Volume 22 (1960 - 196･･･
- Issue 4 Pages 119-
- Issue 3 Pages 83-
- Issue 2 Pages 37-
- Issue 1 Pages 1-
Volume 22, Issue 2
Displaying 1-9 of 9 articles from this issue
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The Characteristics of Governing of the Spark Ignition EngineS. UMEDA1960 Volume 22 Issue 2 Pages 37-41
Published: September 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe load required on the power tiller are affected upon the engine and the reduction gear. Therefore, the relation between the load and the engine has been studied. At first, the characte-ristics of governing of the air cooled and the water cooled engine have been tested. These characteristics have been considered by the automatic control engineering and the experiments have revealed the following.
The characteristics of governing of the engines have been affected upon
(1) the moment of inertia round the crank shaft J,
(2) the internal resistance f or k1 and time constant T1 of engine,
(3) the sensitivity k2 and time constant T2 of carburetor,
(4) the sensitivity of governor k3.
And so the static error ε increased with the load. The speed response for the load fluctuation has been affected upon ωn, and the load fluctuation of the air cooled engine severer than the water cooled engine.View full abstractDownload PDF (774K) -
S. TSUNEMATSU, T. YOSHIDA, K. MATSUI, T. MATSUMI1960 Volume 22 Issue 2 Pages 42-48
Published: September 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe carried out the performance tests for Komatsu WD45 wheel tractor on the grass land (A) and the field (B) at Shin-den-baru (Kyushu), where the soils were very hard clay. The results obtained were as follows.
1. Coefficient of adhesion on the grass land ……0.835
2. Practical maximum drawbar pull on the grass land……1600kg at 20% slippage ……1800kg at 26% slippage.
3. Max. tractive efficiency on the grass land……about 71%
4. It is able to pull a mounted type single standard subsoil plow (Pan-breaker) at a penetration of 43cm on the grass land under 1st, gear operation (0.76m/sec).
Efficiency is 0.44ha/hr, and fuel consumption is about 1.6lt./10a, however the each intervals between adjoining penetration are about 2m.
5. On the grass land, a slippage of the rear wheels becomes 20% at a penetration of about 39cm, however about 40% at a max, allowable penetration of 48.5cm.
6. Plowing efficiency, under pulling 2 bottom 14″ integral-mounted moldboard plow on the field B, is 0.196ha/hr., 3lt/10a fuel consumption, at a depth of 24cm under 1st, gear operation. However under 2nd. gear operation, efficiency is 0.313ha/hr, about 2.8lt/10a fuel consumption, at a depth of 22cm.
7. Efficiency of rotary pulverizer (power-take-off driven, 185cm wide, 48 tines attached) is 0.46ha/hr, about 1.7lt/10a fuel consumption, under 1st gear operation. However under 2nd. gear operation, it was hard work for WD 45 wheel tractor to drive the rotary pulverizer continuously.View full abstractDownload PDF (1121K) -
1960 Volume 22 Issue 2 Pages 48-48,52
Published: September 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (985K) -
S. MASUDA, R. TAKEUCHI1960 Volume 22 Issue 2 Pages 49-52
Published: September 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSWe studied on vibration of the garden tractor which attached rubber tires, comparing effect of high and low pressure tire on the many conditions of ground. The amplitudes of high pressure tire were slight, and were surpassed at the high pneumatic press, when the pneumatic press of both side of tractor wheels were same. The low pressure tires on the contrary, had those amplitudes in excellent condition, when pneumatic press was low and different each other. On the standpoints of vibration, the good results of high press tires were obtained when the preumatic press was kept intermediate, and travel speed was low.
As the results of calculation of resonance ranges, the practical resonance did not affected this tractor, and was very safety.View full abstractDownload PDF (735K) -
The Comparison of the Faculty of Straight Running between the Screw and the RotaryY. CHUMA1960 Volume 22 Issue 2 Pages 53-60
Published: September 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe influences of the moving conditions both for the Screw type and the Rotary type power tiller on the faculty of straight running on the 90° inclined farm were investigated, and following results were obtained.
(1) Running curve of the Screw type is shown by general formula 10-2×y=ax2-bx, and that of the Rotary type is 10-2×y=-ax2-bx, where x: distance of procession (m), y: distance of descent (m), a, b: constant.
(2) The faculty of straight running of power tiller advances according to the following conditions:
1) The decrease of running speed in both type.
2) Shallow tillage with the Screw and deep tillage with the Rotary.
3) Compact soil surface with the Screw, and slacked soil surface with the Rotary.
4) The increase of water content of soil in the case of applyng the Screw, and the decrease of that with Rotary.
5) At the high air pressure in the pneumatic tire with both type.
6) The sort of equipped blade or tine, in the following order,
Screw: three winged screw blade>three winged screw blade with dulled edge>two winged screw digger.
Rotary: standard type tine>flat knife tine (short type)>flat knife tine (long type).
7) The decrease of the amount of farm trash twined round the screw and the rotary shaft.
8) The increase of the equipped weight at the head frame of the Screw, and at the rear handle of the Rotary.
9) The most at the deviation angle of tail wheel approximately 15° with the Screw, and 22° with the Rotary.
10) The increase of the distance between both vertical screw shafts (=the breadth of tillage).View full abstractDownload PDF (2794K) -
On the Slippage Characteristics of Puddling RotorS. YAMAZAWA1960 Volume 22 Issue 2 Pages 61-65
Published: September 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSThe writer made analytical studies on the characteristics of the puddling rotor mounted on a small-type tractor, making special experiments on the load, and the puddling, characteristics in connection with the slippage of travelling wheels with a view to making clear the working conditions of a puddling rotor and obtaining the technical data for the development of new designs.
1. Power consumption
The power consumption in puddling per unit width per unit section showed an increase in logarithmical proportion to slippage and travelling speed.
2. Slippage rate, speed, etc.
The writer's experiments disclosed that the optimum slippage rate of travelling wheels was within the range of 40 to 50%, where the speed registered 0.68 to 0.81 meter per second. The consumption of electric power was 0.66 to 1.1kw while the horsepower required 0.9 to 1.1PS. The power consumption was 5 to 9w/cm per unit width, and 0.61 to 0.95w/cm2 per section, respectively. The puddling resistance measured 0.63 to 0.087kg/cm2.
3. The harrowing effect of the puddling rotor on aggregations smaller than 0.5mm and larger than 8cm was much diversified, while the harrowing index declined as the power consumption and the speed rose.
4. The puddling resistance increased in logarithmic prportion to the increase in the slippage rate.View full abstractDownload PDF (2709K) -
(1) Determination of the Most Economical Diameter of the Pipe LineK. NAKAGAWA1960 Volume 22 Issue 2 Pages 66-70
Published: September 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESS1 The relation between the capital and operating cost required for sprinkler-irrigation and the diameter of the pipe line available for the system has been investegated.
2 The most economical diameter of the pipe line for sprinkler-irrigation will the approximately calculated by the following equation, within
the limit of q≤500l/mim.
d=0.172N0.156q0.47
where, d is the diameter of the steel pipe line (cm), N is operating hours all the year around, and q is the water discharge of sprinklers
3 The most economical diameter of the pipe line for the small-scale sprinkler system, which has been designed and practically used by Japanese farmers, is calculated by the equations under various conditions such as changes of the discharge, operating hours all the year around, the diameter of the pipe line and so forth. The results studied with these factors are illustrated,
4 The auther discussed as to the method for the most economical sprinkler-system.View full abstractDownload PDF (707K) -
On the Flowing Characteristics of Fertilizer in the Top-delivery HopperM. WAKUI1960 Volume 22 Issue 2 Pages 71-74
Published: September 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESS1) Fertilizer in the top-delivery hopper flows up almost as the streamline flow of liquid. But, as shown in Fig. 1, during flowing occurs the compression of fertilizer (Fig. 2), and near the hopper wall, there takes place the relative delay of flowing speed of fertilizer particles, which is due to both the wall effect on the porosity in case of packing and the compress ibility of fertilizer.
2) The higher the fluidity of fertilizer is, the larger the pressure of fertilizer on the bottom plate is Fig. 3). The change of this pressure during flowing reflects the cohesiveness of fertilizer.
3) The real discharge volume from the hopper is always less than the theoritical nearly in proportion to the degree of the above compression, (Fig. 4), so that it is expressed in equation (1).View full abstractDownload PDF (2311K) -
F. Shoji1960 Volume 22 Issue 2 Pages 75-78
Published: September 30, 1960
Released on J-STAGE: April 30, 2010
JOURNAL FREE ACCESSDownload PDF (838K)
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